bio 135 practical

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bio 135 practical
2013-09-24 15:43:00

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  1. what is composed of two sets of bones
  2. what are the two bones that make up the skull
    cranium and facial bones
  3. what skull bone encloses and protects the fragile brain tissue
  4. what skull bone support the eyes and position them anteriorly
    facial bones
  5. what two major areas for study are the cranium divided into
    cranial vault or calvaria and cranial base
  6. which of the cranium bones forms the skull bottom
    cranial base
  7. which cranium bone forms the superior, lateral, and posterior walls of the skull
    cranial vault/calvaria
  8. how many bones make up the skull?
  9. anterior portion of the cranium; forms the forehead, superior part of the orbit, and floor of anterior cranial fossa
    frontal bone
  10. opening above each orbit allowing blood vessels and nerves to pass
    supraorbital foramen
  11. smooth area between the eyes
  12. posterolateral to the frontal bone, forming sides of cranium
    parietal bone
  13. midline articulation point of the two parietal bones
    sagittal suture
  14. point of articulation of parietals with frontal bone
    coronal suture
  15. inferior to parietal bone on lateral skull, can be divided into three major parts: the squamous part borders the parietals; the tympanic part surrounds the external ear opening; and the petrous part forms the lateral portion of the skull base and contains the mastoid process
    temporal bone
  16. point of articulation of the temporal bone with the parietal bone
    squamous suture
  17. a bridgelike projection joining the zygomatic bone anteriorly together these two bones form the zygomatic arch
    zygomatic process
  18. rounded depression on the inferior surface of the zygomatic process; forms the socket for the condylar process of the mandible, where the mandible joins the cranium
    mandibular fossa
  19. canal leading to eardrum and middle ear
    external acoustic meatus
  20. needlelike projection inferior to external acoustic meatus, attachment point for muscles and ligaments of the neck
    styloid process
  21. opening medial to the styloid process through which the internal jugular vein and cranial nerves IX, X, and XI pass
    jugular foramen
  22. opening medial to the styloid process through which the internal carotid artery passes into the cranial cavity
    carotid canal
  23. opening on posterior aspect of temporal bone allowing passage of cranial nerves VIII and VII
    internal acoustic meatus
  24. a jagged opening between the petrous temporal bone and the sphenoid providing passage for a number of small nerves and for the internal carotid artery to enter the middle cranial fossa
    foramen lacerum
  25. tiny opening between the mastoid and styloid processes through which cranial nerve VII leaves the cranium
    stylomastoid foramen
  26. rough projection inferior and posterior to external acoustic meatus; attachment site for muscles
    mastoid process
  27. most posterior bone of the cranium- forms floor and back wall; joins spheniod anteriorly via its narrow basilar part
    occipital bone
  28. site of articulation of occipital bone and parietal bones
    lambdoid suture
  29. large opening in base of occipital, which allows the spinal cord to join with the brain
    foramen magnum
  30. rounded projections later to the foramen magnum that articulates with the first cervical vertebra(atlas)
    occipital condyles
  31. opening medial and superior to the occipital condyle through which the hypoglossal nerve passes
    hypoglossal canal
  32. midline prominences posterior to the foramen magnum
    external occipital crest and protuberance
  33. bat-shaped bone forming the anterior plateau of the middle cranial fossa across the width of the skull, is the keystone of the cranium because it articulates with all other cranial bones
    spheniod bone
  34. portions of the spheniod seen exteriorly anterior to the temporal and forming a part of the eye orbits
    greater wings
  35. inferiorly directed trough-shaped projections from the junction of the body and the greater wings
    pterygoid processes
  36. jagged opening in orbits providing passage for cranial nerves III, IV, V and VI to enter the orbit where they serve the eye
    superior orbit fissures
  37. a saddle shaped region in the sphenoid midline,
    sella turcica
  38. the seat of the saddle surround the pituitary glad
    hypophyseal fossa
  39. bat-shaped portions of the spheniod anterior of the sella turcica
    lesser wing
  40. openings in the bases of the lesser wings through which the optic nerves enter the orbits to serve the eyes
    optic canals
  41. openings lateral to the sella turcica providing passage for a branch of the fifth cranial nerve
    foramen rotundum
  42. opening posterior to the sella turcica that allows passage of a branch of the fifth cranial nerve
    foramen ovale
  43. irregularly shaped bone anterior tot he sphenoid, forms roof of the nasal cavity, upper nasal septum, and part of the medial orbit walls
    ethmoid bone
  44. vertical projection providing a point of attachment for the dura mater, helping to secure the brain within the skull
    crista galli
  45. bony plates later to the crista galli through which olfactory fibers pass to the brain from the nasal mucosa through the
    cribriform plate
  46. inferior projection of the ethmoid that forms the superior part of the nasal septum
    perpendicular plate
  47. irregularly shaped and thin-walled bony regions flanking the perpendicular plate laterally. their lateral surfaces shape part of the medial orbit wall
    lateral masses
  48. thin delicately coiled plates of bone extending medially from the lateral masses of the ethmoid bone into the nasal cavity the conchae make air flow through the nasal cavity more efficient and greatly increase the surface area of mucous, ability to warm and humidify incoming air
    superior and middle nasal conchae